Reduce build warnings for fuzzer

Bug: 264549607
Bug: 267867903
Test: cert/run
Tag: #refactor

Change-Id: I46f6780df62d4d15377096ec4498bf2a17bf70b4

system/btcore/fuzzer/Android.bp

@@ -25,6 +25,12 @@ package {
 
 cc_defaults {
     name: "btcore_fuzz_defaults",
+    cflags: [
+        // http://b/264549607
+        "-Wno-deprecated-builtins",
+        // http://b/267867903
+        "-Wno-deprecated-declarations",
+    ],
     shared_libs: [
         "android.hardware.bluetooth@1.0",
         "android.hardware.bluetooth@1.1",